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1 | /* |
2 | ** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for |
3 | ** distribution information. |
4 | */ |
5 | |
b0322a85 |
6 | #include "config.h" |
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7 | #include <string.h> |
8 | #include <stdlib.h> |
9 | #include "bdbobj.h" |
10 | |
11 | char *bdbobj_firstkey(struct bdbobj *obj, size_t *keylen, char **val, |
12 | size_t *vallen) |
13 | { |
14 | DBT key, value; |
15 | |
16 | if (!obj->has_dbf) return (0); |
17 | |
18 | memset(&key, 0, sizeof(key)); |
19 | memset(&value, 0, sizeof(value)); |
20 | |
21 | #if DB_VERSION_MAJOR < 2 |
22 | if ((*obj->dbf->seq)(obj->dbf, &key, &value, R_FIRST)) return (0); |
23 | #else |
24 | if (obj->has_dbc) |
25 | { |
26 | (*obj->dbc->c_close)(obj->dbc); |
27 | obj->has_dbc=0; |
28 | } |
29 | |
30 | #if DB_VERSION_MAJOR > 2 |
31 | if ((*obj->dbf->cursor)(obj->dbf, 0, &obj->dbc, 0)) return (0); |
32 | #else |
33 | #if DB_VERSION_MINOR >= 5 |
34 | if ((*obj->dbf->cursor)(obj->dbf, 0, &obj->dbc, 0)) return (0); |
35 | #else |
36 | if ((*obj->dbf->cursor)(obj->dbf, 0, &obj->dbc)) return (0); |
37 | #endif |
38 | #endif |
39 | obj->has_dbc=1; |
40 | |
41 | if ((*obj->dbc->c_get)(obj->dbc, &key, &value, DB_FIRST)) return (0); |
42 | #endif |
43 | *keylen=key.size; |
44 | *vallen=value.size; |
45 | if ((*val=(char *)malloc(*vallen)) == 0) return (0); |
46 | |
47 | memcpy(*val, value.data, *vallen); |
48 | return ((char *)key.data); |
49 | } |
50 | |
51 | char *bdbobj_nextkey(struct bdbobj *obj, size_t *keylen, char **val, |
52 | size_t *vallen) |
53 | { |
54 | DBT key, value; |
55 | |
56 | if (!obj->has_dbf) return (0); |
57 | |
58 | memset(&key, 0, sizeof(key)); |
59 | memset(&value, 0, sizeof(value)); |
60 | |
61 | #if DB_VERSION_MAJOR < 2 |
62 | if ((*obj->dbf->seq)(obj->dbf, &key, &value, R_NEXT)) return (0); |
63 | #else |
64 | if (!obj->has_dbc) return (0); |
65 | |
66 | if ((*obj->dbc->c_get)(obj->dbc, &key, &value, DB_NEXT)) |
67 | { |
68 | (*obj->dbc->c_close)(obj->dbc); |
69 | obj->has_dbc=0; |
70 | } |
71 | #endif |
72 | |
73 | *keylen=key.size; |
74 | *vallen=value.size; |
75 | if ((*val=(char *)malloc(*vallen + 1)) == 0) return (0); |
76 | |
77 | memcpy(*val, value.data, *vallen); |
78 | (*val)[*vallen]=0; |
79 | |
80 | return ((char *)key.data); |
81 | } |